I think that it all depends on how much they have been hunted.
I have been quite a few times and think baboon are pretty clever but not sure you could call them plains game.
Zebra are usually pretty switched on in most instances. Big kudu bulls are like big mule deer bucks, pretty dam smart.
I have never witnessed a sharp sable or nyala but I am sure others have.
Just betting how smart a critter is directionally proportional to how hard they are hunted, although I have never seen a dumb baboon other than on a highway.
